Impact of feedback and user pairing schemes on receiver performance in MU-MIMO LTE systems

Author

Badic, B. ; Balraj, R. ; Scholand, T. ; Bai, Z. ; Iwelski, S.

Author_Institution

Intel Mobile Commun. (IMC), Duisburg, Germany

fYear

2012

fDate

1-4 April 2012

Firstpage

399

Lastpage

403

Abstract

This paper addresses the problem of feedback design for MU-MIMO (multi-user multiple input multiple output) transmission in 3GPP Long Term Evolution (LTE) systems. The CSI (channel state information)-based feedback introduced in the latest release of LTE, Rel-10 is adopted in MU-MIMO transmission and potential performance gains are demonstrated over Rel-8 CQI/PMI (channel quality indicator/precoding matrix indicator)-based feedback mechanism at the link level. The LTE downlink performance has been evaluated for various MU-MIMO feedback schemes and for low complexity receivers. The results have shown that the CSI-based feedback can make a significant tradeoff between receiver performance and complexity in MU-MIMO therewith reducing the design requirements for advanced receiver concepts.

Keywords

3G mobile communication; Long Term Evolution; MIMO communication; radio receivers; 3GPP Long Term Evolution systems; CSI-based feedback; MU-MIMO LTE system; Rel-8 CQI-PMI; channel quality indicator-precoding matrix indicator-based feedback mechanism; feedback scheme; low complexity receivers; multiuser multiple input multiple output transmission; receiver performance; user pairing scheme; Complexity theory; Correlation; Interference; MIMO; Radio access networks; Receivers; Vectors;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference (WCNC), 2012 IEEE

Conference_Location

Shanghai

ISSN

1525-3511

Print_ISBN

978-1-4673-0436-8

Type

conf

DOI

10.1109/WCNC.2012.6214398

Filename

6214398